Thread-lock for hand-threading loom-shuttles



LVl ALLEN.,

THREAD LOCK FO'R HAND THREADING LOOM SHUTTLES. APPLI.CATION F|LED APR. 29, 1919.

1,336,805. Patented Apr. 13, 192%,

2 mar/0101111111 INVEN TUE MM 1%A%4l%r ZKTTUEAZE 1" 7' UNITED STATES PATENT OFFICE.

JOHN VICTOR ALLEN, OF PROVIDENCE,"RHODE ISLAND.

THREAD-LOCK FOR HAND-THBEADING LOOM-SIIUTTLES.

Application filed April 2:9, 1919.

To all whom it may concern:

Be it known that I, JOHN Vrcror: ALLEN, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Thread-Locks for Hand-Threading Loom- Shuttles, of which the following is a specification.

This invention has reference to an improvement in loom shuttles and more particularly to an improvement in hand threading loom shuttles whereby the thread is locked in the shuttle against unthreading, when the shuttle is in use.

In the usual construction of hand threading loom shuttles when in operation in a loom, the thread is liable to and does at times whip around the shuttle eye and catching into the slit in the eye, will come out of the eye, back through the thread slits in the shuttle into the bobbin cavity, thereby unthreading the shuttle and causing damage to the cloth in the process of weaving and stopping the loom to re-thread the shuttle.

The object of my invention is to provide a hand threading loom shuttle with a weft thread lock, whereby the thread is locked in the thread slit in the shuttle, thereby pre venting the thread from unthreading and working back into the bobbin cavity of the shuttle.

My invention consists in the peculiar and novel construction and operation of a weft thread lock for hand threading loom shuttles, whereby the thread is locked in the thread slit, the thread lock may be easily, quickly and cheaply applied to any form of a hand threading loom shuttle, said thread lock having details of construction, as will be more fully set forth hereinafter and claimed.

Figure 1 is a top View of the eye end of a hand threading loom shuttle provided with my improved thread lock.

Fig. 2 is a side view of Fig. 1.

Fig.3 is an enlarged transverse sectional view through the shuttle taken on line 33 of Fig. 1 showing the thread lock in full lines.

Fig. 4: is a longitudinal sectional view through the thread lock taken on line 4 4. of Fig. 3, and

Fig. 5 is a transverse sectional View through the thread lock taken on line 5-5 of Fig. 3.

In the drawing 6 indicates the eye end of Specification of Letters Patent.

Patented Apr. 13, 192%.

Serial No. 293,442.

a hand threading loom shuttle and 7 my improved thread lock.- The shuttle has the usual bobbin 8, bobbin cavity 9, thread cavity 10, hand threading eye 11, vertical thread slit 12 which merges into a horizontal thread slit 13 that connects with the well known side thread slit, not shown, in the eye 11. A hole 1% is bored in the shuttle at right angles to and intersects the thread slit 12 for the thread lock 7 and a transverse pin hole 15 is bored in the shuttle through the hole 1% for a pin 16, as shown in Fig. 3.

My improved thread lock 7 consists of a round shell 17 having an open end 18, an internal longitudinal spline 19 and a closed end 20 in which is an outer transverse groove 21. A movable bolt 22 has a beveled outer end 23, a longitudinal groove 24 engaging with the spline 19 and a sliding fit in the shell 17. A coiled spring 25 in the shell 17 engages with the end 20 of the shell and the inner end of the bolt 22, as shown in Fig. 4: and exerts a spring tension to move the bolt outward.

The thread lock is pushed into the hole 14 in the shuttle, with the beveled end of the bolt against the farther wall of' the thread slit 12 and facing upward. The thread lock is now secured in place by driving the pin 16 into the hole 15 and through the groove 21 in the thread look, as shown in Fig. 3. The pin 16 in the groove 21 also prevents the thread lock from turning in the hole 1%.

lVhen the shuttle is threaded by hand in the usual way, the thread 26 passes down the thread slit 12 and over the beveled end 23 of the bolt 22, forcing the bolt 22 back, against the tension of the spring 25. The thread then goes through the thread slit 13 to and out of the eye 11 of the shuttle, as shown in Fig. 1.

hen the shuttle is in operation and the thread 26 comes out of the shuttle eye back into the thread slit 12, the thread will engage with the straight underside of the bolt 22, which will prevent the thread from coming out of the slit 12, thereby locking the thread in the slit. The next forward or backward movement of the shuttle, in weaving, will carry the thread automatically back through the slits 12 and 13 into the shuttle e e.

By the use of my improved thread lock for hand threading loom shuttles the thread is locked against unthreading, when the shuttle is in operation, thereby eliminating breaking of the weft thread, damage to the cloth'and producing a more perfect Weave in the cloth, than has heretofore been done.

It is evident that the construction of in improved thread lock for hand threading loom shuttles could be varied Within the scope of the appended claim.

Having thus described my invention I claim as new.

A thread lock for hand threading loom shuttles comprising a round shell having an internal longitudinal spline, a coiled spring in the shell, a bolt in the shell engaging the spring and having a longitudinal groove engaging the spline anda beveled outer end means for securing the thread lock in its operative position as described, in a hand threading loom shuttle and means for holding the thread look from turning in the shuttle. V

In testimony whereof I have signed my name to this specification.

' JOHN VICTOR ALLEN. 

